Question

Receive 3 Warnings: mysqli_query() for function create_tb(), first       parameters are "CREATE TABLE session id ()" and "CREATE TABLE user ()" on   lines 151 and 170 haven't a clue what the second would be?

第170行还有mysqli_error（）？

错误

Warning: mysqli_query() expects at least 2 parameters, 1 given in C:\line   151

警告：mysqli_query（）需要至少2个参数，1在C：\ line 170中给出警告：mysqli_error（）需要1个参数，0在C：\ line 170

中给出

enter code here

function create_tb()
{
// This function creates all the nessesary tables for database
global $db_link, $host_name, $db_user,$db_password,
$html_header, $html_footer, $db_name, $table_ads; 
$sql_query1=sql_create_tb();
$db_link = mysqli_connect($host_name, $db_user, $db_password);
mysqli_query($db_link, $sql_query1);                     

mysqli_query ("
CREATE TABLE session_id (
 id int(10) unsigned NOT NULL auto_increment,
 cookie varchar(255) NOT NULL default '',
 user_id int(10) NOT NULL default '0',
 last_request int(10) NOT NULL default '0',
 PRIMARY KEY  (id),
 UNIQUE KEY id (id)
 )");                                                      //line 151

mysqli_query ("
CREATE TABLE user (
 id int(10) unsigned NOT NULL auto_increment,
 user_name text NOT NULL,
 email text NOT NULL,
 passwd text NOT NULL,
 tel text NOT NULL,
 fax text NOT NULL,
 city text NOT NULL,
 state text NOT NULL,
 ip text NOT NULL,
 category text NOT NULL,
 lastup_date int(10) NOT NULL default '0',
 member_date int(10) NOT NULL default '0',
 PRIMARY KEY  (id),
 UNIQUE KEY id (id)
 )") or die (mysqli_error());                             //line 170

Answer 1

您必须将db连接标识符作为第一个参数。例如：

mysqli_query($conn,"SELECT * FROM xxxxx");

Answer 2

错误非常明确：您需要2个参数： - 连接标识符 - 查询。

例如：

mysqli_query ($db_link, "
CREATE TABLE session_id (
 id int(10) unsigned NOT NULL auto_increment,
 cookie varchar(255) NOT NULL default '',
 user_id int(10) NOT NULL default '0',
 last_request int(10) NOT NULL default '0',
 PRIMARY KEY  (id),
 UNIQUE KEY id (id)
 )");

没有第一个参数，mysqli函数不知道要使用哪个数据库，因此它会显示上面的错误

警告：mysqli_query（）需要至少2个参数，给出1

2 个答案: